/* ==========================================================================
   1. VARIABLES DE COULEUR & RESET
   ========================================================================== */
:root {
    --dark-navy: #151828;      /* Fond sombre bandeau supérieur & footer */
    --accent-orange: #ff6b00;   /* Couleur orange d'accentuation */
    --white: #ffffff;
    --text-dark: #1f2335;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 95%;
    max-width: 1400px;
    margin: 0 auto;
}

.main-content {
    flex: 1;
}

/* ==========================================================================
   2. BANDEAU SUPÉRIEUR (RÉSEAUX SOCIAUX)
   ========================================================================== */
.top-bar {
    background-color: var(--dark-navy);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-content {
    display: flex;
    justify-content: flex-end;
}

.social-links a {
    color: var(--white);
    margin-left: 15px;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-orange);
}

/* ==========================================================================
   3. BARRE DE NAVIGATION
   ========================================================================== */
.main-header {
    background-color: var(--white);
    padding: 18px 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    font-size: 1.7rem;
    font-weight: 1000;
}

.logo-bold {
    color: #ff6b00;
}

.logo-orange {
    color: #111111;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.main-nav a {
    text-decoration: none;
    color: #111111;
    font-size: 1rem;
    font-weight: 800px;
    transition: color 0.3s ease;
}

.main-nav a.active,
.main-nav a:hover {
    color: var(--accent-orange);
    border-bottom: 2px solid var(--accent-orange);
    padding-bottom: 4px;
}

/* ==========================================================================
   4. FOOTER (PIED DE PAGE)
   ========================================================================== */
.main-footer {
    background-color: #1f0d5f;
    color: var(--white);
    padding-top: 20px;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 15px;
}

.footer-col:first-child {
    text-align: left;
    max-width: 450px;
}

.footer-col h3 {
    color: var(--accent-orange);
    margin-bottom: 4px;
    font-size: 1.2rem;
}

.footer-col p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.4;
    color: rgba(255, 255, 255, 0.8);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 4px;
}

.footer-col:last-child h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 6px;
}

.footer-col:last-child p {
    text-align: right;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-col:last-child i {
    margin-right: 6px;
    color: var(--accent-orange);
}

.footer-bottom {
    background-color: #111111;
    text-align: center;
    padding: 8px 0;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   5. RESPONSIVE DESIGN (HEADER/FOOTER)
   ========================================================================== */
@media (max-width: 900px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }

    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
}

/* ==================================================
   STEP PAGE
   Palette harmonisée sur étape2 :
   - Titres / fonds sombres : #0B2545
   - Accent : #F57C00 (orange uni, plus de dégradé)
   - Texte courant : #444444 / #333333
================================================== */

.step-page {
    padding: 4rem  2rem  5rem;
    background: #f7f8fa;
}

.step-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}


/* ==================================================
   STEP INTRO
================================================== */

.step-intro {
    text-align: center;
    margin-bottom: 4rem;
    padding-bottom: 2.5rem;
    border-bottom: 2px solid rgba(11, 37, 69, 0.06);
}

.step-kicker {
    display: inline-block;
    background: #F57C00;
    color: #FFFFFF;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 2px;
    padding: 0.4rem 1.6rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.step-intro h1 {
    font-size: 3.2rem;
    font-weight: 800;
    color: #0B2545;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.step-intro h1 span {
    color: #F57C00;
}

.step-title-line {
    width: 80px;
    height: 4px;
    background: #F57C00;
    margin: 0.75rem auto 1.5rem;
    border-radius: 4px;
}

.step-lead {
    font-size: 1.35rem;
    font-weight: 600;
    color: #0B2545;
    max-width: 700px;
    margin: 0 auto 1.2rem;
}

.step-intro p:last-of-type {
    max-width: 720px;
    margin: 0 auto;
    color: #333333;
    font-size: 1.05rem;
    
}


/* ==================================================
   STEP MESSAGE
================================================== */

.step-message {
    background: #0B2545;
    color: #ffffff;
    padding: 3rem 3.5rem;
    border-radius: 20px;
    margin-bottom: 4rem;
    text-align: center;
    border-left: 5px solid #F57C00;
}

.step-message h2 {
    font-size: 1.9rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    line-height: 1.3;
}

.step-message h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #F57C00;
    margin: 1rem auto 0;
    border-radius: 4px;
}

.step-message p {
    color: #e9edf3;
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto 1rem;
}

.step-message strong {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: #F57C00;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}


/* ==================================================
   CHAPTERS
================================================== */

.chapters {
    margin-bottom: 4rem;
}

.chapters-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #0B2545;
    text-align: center;
    margin-bottom: 2.5rem;
}

.chapters-title::after {
    content: '';
    display: block;
    width: 70px;
    height: 3px;
    background: #F57C00;
    margin: 0.6rem auto 0;
    border-radius: 4px;
}


/* ==================================================
   CHAPTER CARD
================================================== */

.chapter-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 2rem 2.5rem;
    margin-bottom: 1.8rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border-left: 5px solid #e5e5e5;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
    border-left: 5px solid #F57C00;
}

.chapter-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(0, 0, 0, 0.07);
}


.chapter-number {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    color: #F57C00;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: rgba(245, 124, 0, 0.08);
    padding: 0.2rem 1rem;
    border-radius: 50px;
    margin-bottom: 0.6rem;
}

.chapter-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0B2545;
    margin-bottom: 0.8rem;
}

.chapter-card p {
    color: #444444;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.chapter-points {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 0.4rem;
}

.chapter-points span {
    background: #f7f8fa;
    color: #0B2545;
    padding: 0.25rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.chapter-featured .chapter-points span {
    background: rgba(245, 124, 0, 0.12);
    color: #F57C00;
}


/* ==================================================
   COMMON ERRORS
   (Rouge conservé pour le sens "erreur", mais en aplat,
   sans dégradé, pour rester cohérent avec le reste)
================================================== */

.common-errors {
    background: #ffffff;
    border-radius: 20px;
    padding: 3rem 3rem 2.5rem;
    margin-bottom: 4rem;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.04);
}

.errors-title {
    font-size: 2rem;
    font-weight: 700;
    color: #0B2545;
    text-align: center;
    margin-bottom: 2rem;
}

.errors-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #c0392b;
    margin: 0.5rem auto 0;
    border-radius: 4px;
}

.errors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem 2rem;
}

.error-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 0.8rem 0.5rem;
    border-bottom: 1px solid #f0f0f8;
}

.error-item:last-child,
.error-item:nth-last-child(2) {
    border-bottom: none;
}

.error-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    background: #c0392b;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.8rem;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.error-item p {
    color: #444444;
    font-size: 0.95rem;
    margin: 0;
}


/* ==================================================
   STEP CONCLUSION
================================================== */

.step-conclusion {
    background: #0B2545;
    color: #ffffff;
    padding: 3rem 3.5rem;
    border-radius: 20px;
    margin-bottom: 3rem;
    text-align: center;
    border-left: 5px solid #F57C00;
}

.conclusion-kicker {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: #F57C00;
    text-transform: uppercase;
    background: rgba(245, 124, 0, 0.12);
    padding: 0.3rem 1.4rem;
    border-radius: 50px;
    margin-bottom: 0.8rem;
}

.step-conclusion h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.step-conclusion p {
    color: #e9edf3;
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto 1.2rem;
}

.conclusion-line {
    width: 70px;
    height: 3px;
    background: #F57C00;
    margin: 0 auto 1.2rem;
    border-radius: 4px;
}

.step-conclusion strong {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: #F57C00;
    letter-spacing: 0.5px;
    
}


/* ==================================================
   GOLDEN RULES
================================================== */

.golden-rules {
    background: #ffffff;
    border-radius: 20px;
    padding: 3rem 3.5rem;
    margin-bottom: 3.5rem;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.04);
    border-left: 5px solid #F57C00;
}

.rules-title {
    font-size: 2rem;
    font-weight: 700;
    color: #0B2545;
    text-align: center;
    margin-bottom: 2rem;
}

.rules-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #F57C00;
    margin: 0.5rem auto 0;
    border-radius: 4px;
}

.rules-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem 2.5rem;
}

.rules-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.6rem 0;
    color: #444444;
    font-size: 0.98rem;
    border-bottom: 1px solid #f5f5fa;
}

.rules-list li:nth-last-child(2),
.rules-list li:last-child {
    border-bottom: none;
}

.rule-number {
    font-weight: 700;
    color: #F57C00;
    min-width: 28px;
    flex-shrink: 0;
}


/* ==================================================
   STEP NAVIGATION
================================================== */

.step-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid rgba(11, 37, 69, 0.06);
}

.step-button {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: 0.3px;
}

.step-button.primary {
    background: #F57C00;
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(245, 124, 0, 0.25);
}

.step-button.primary:hover {
    background: #DF6F00;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 124, 0, 0.35);
}

.step-button.secondary {
    background: #FFFFFF;
    color: #F57C00;
    border: 2px solid #F57C00;
}

.step-button.secondary:hover {
    background: #F57C00;
    color: #FFFFFF;
    transform: translateY(-2px);
}


/* ==================================================
   RESPONSIVE
================================================== */

@media (max-width: 992px) {

    .step-intro h1 {
        font-size: 2.6rem;
    }

    .step-message {
        padding: 2.5rem 2rem;
    }

    .step-message h2 {
        font-size: 1.6rem;
    }

    .chapters-title {
        font-size: 1.8rem;
    }

    .chapter-card {
        padding: 1.6rem 1.8rem;
    }

    .chapter-card h3 {
        font-size: 1.25rem;
    }

    .common-errors {
        padding: 2rem 1.8rem;
    }

    .errors-grid {
        grid-template-columns: 1fr;
    }

    .error-item:nth-last-child(2) {
        border-bottom: 1px solid #f0f0f8;
    }

    .error-item:last-child {
        border-bottom: none;
    }

    .golden-rules {
        padding: 2rem 1.8rem;
    }

    .rules-list {
        grid-template-columns: 1fr;
    }

    .rules-list li:nth-last-child(2) {
        border-bottom: 1px solid #f5f5fa;
    }

    .rules-list li:last-child {
        border-bottom: none;
    }

    .step-conclusion {
        padding: 2.5rem 2rem;
    }

    .step-conclusion h2 {
        font-size: 1.6rem;
    }

}

@media (max-width: 768px) {

    .nav-container {
        flex-direction: column;
        align-items: center;
        padding: 0 1.2rem;
    }

    .main-nav {
        justify-content: center;
        gap: 0.8rem 1.2rem;
    }

    .main-nav a {
        font-size: 0.8rem;
    }

    .step-intro h1 {
        font-size: 2rem;
    }

    .step-intro p {
        font-size: 0.95rem;
    }

    .step-lead {
        font-size: 1.1rem;
    }

    .step-message {
        padding: 1.8rem 1.2rem;
    }

    .step-message h2 {
        font-size: 1.3rem;
    }

    .step-message strong {
        font-size: 1rem;
    }

    .chapter-card {
        padding: 1.2rem 1.2rem;
    }

    .chapter-card h3 {
        font-size: 1.1rem;
    }

    .chapter-points span {
        font-size: 0.7rem;
        padding: 0.2rem 0.8rem;
    }

    .step-conclusion {
        padding: 2rem 1.2rem;
    }

    .step-conclusion h2 {
        font-size: 1.3rem;
    }

    .step-conclusion strong {
        font-size: 1rem;
    }

    .common-errors {
        padding: 1.5rem 1.2rem;
    }

    .errors-title {
        font-size: 1.5rem;
    }

    .golden-rules {
        padding: 1.5rem 1.2rem;
    }

    .rules-title {
        font-size: 1.5rem;
    }

    .step-navigation {
        gap: 0.8rem;
    }

    .step-button {
        padding: 0.6rem 1.4rem;
        font-size: 0.8rem;
    }

}

@media (max-width: 480px) {

    .step-intro h1 {
        font-size: 1.7rem;
    }

    .step-kicker {
        font-size: 0.65rem;
        padding: 0.3rem 1.2rem;
    }

    .main-nav {
        gap: 0.5rem 0.8rem;
    }

    .main-nav a {
        font-size: 0.7rem;
    }

    .logo {
        font-size: 1.3rem;
    }

    .step-container {
        padding: 0 1rem;
    }

    .chapter-points {
        gap: 0.4rem;
    }

    .chapter-points span {
        font-size: 0.65rem;
        padding: 0.15rem 0.6rem;
    }

    .step-button {
        padding: 0.5rem 1rem;
        font-size: 0.7rem;
    }

}